BRIDGING BY ADSORBED POLYMERS BETWEEN 2 SURFACES

We analyze the adsorption of flexible polymers between two parallel pl ates separated a distance 2l. We consider a semidilute polymer solutio n in contact with the two adsorbing walls and describe the statistics of bridges and loops. A detailed mean-field calculation allows us to o btain the size and density of bridges in two regimes: l>xi and l<xi, w here xi is the bulk correlation length, as well as the size of loop an d train sequences. These results are compared with a scaling analysis performed in the spirit of the self-similar profile introduced by de G ennes.